JPS6087421A - Rotary head type reproducer - Google Patents

Abstract

PURPOSE:To perform tracking with high stability and a high following speed by using a shift means which shifts a rotary head in the direction orthogonal to the revolving face of the rotary head. CONSTITUTION:A flip-flop 37 is first reset when the power supply of a reproducer is switched on. Then the output -Q of the frlip-flop 37 is set at a high level and therefore a subordinate counter 38 is kept under a reset state. The counter 38 delivers an overflow signal when a capstan FG is supplied to a terminal 17 equivalent to 2TP and at the same time has self-resetting or zero- resetting. Thus the count output of the counter 38 is shown in a figure (d-1) in a 1.5-fold speed reproduction mode. In this case, a figure (e-1) shows the count output of a host counter 39 which counts the overflow signals sent from the counter 38. Therefore the synthesized count output of both counters 38 and 39 is shown in a figure (f-1). A pattern signal shown in a figure (g-1) is delivered from an adder 25 since the adder 25 adds the output of a D/A converter 40 and the output of a D/A converter 29. Thus a desired shift is satisfied for both heads 2A and 2B.

Description

Detailed Description of the Invention [Technical Field] The present invention relates to a rotary head type reproducing device, and more particularly, to a rotary head type reproducing device, in which recording tracks formed at a predetermined arrangement pitch on a recording medium transported by a transporting means are moved by a shifting means. This relates to a rotary head type reproducing device that reproduces a recorded signal by tracing it with a rotary head that is displaced in a direction perpendicular to the rotating surface. The present invention relates to control of the shifting means when performing reproduction at different speeds.

<Description of Prior Art> In a rotating head type playback device such as a VTR, playback is performed at an arbitrary speed different from the recording speed, such as high-speed playback, low-speed playback (including static playback), and reverse playback (so-called special playback). In order to prevent noise bars and ensure stable and clear image reproduction, it is necessary to ensure that the playback head accurately traces one recording track in each scan field. .

Conventionally, as one means to realize such a function,
A pattern signal generator is provided which generates a pattern signal corresponding to the distance from the scanning locus of the playback head to the recording track on the tape at a given tape running speed, and the pattern signal obtained from the pattern code generator is provided. Accordingly, a method is known in which a displacement means such as an electro-mechanical conversion element (for example, a bimorph element) for displacing the reproducing head in a direction perpendicular to its rotational surface is controlled.

FIG. 1 is a diagram showing a conventional VTR of this type, and particularly shows a schematic configuration of essential parts related to the present invention. In FIG. 1, 1 is a magnetic tape as a recording medium, 2A and 2
Reference numeral B designates a reproducing magnetic head, which is provided so as to have the same azimuth angle and face each other at 18 degrees, and includes electro-mechanical transducer elements 3A and 3 such as bimorph elements as displacement means, respectively.
6 conversion elements 3A and 3 attached to the free end of B
B is attached to the rotating member 4 at its tail end,
Further, the rotating member 4 is rotated by a head rotation motor 5 as shown by an arrow in the figure. Although not shown in the figure, as is well known, the heads 2A and 2B are rotated while protruding from a slit between a pair of tape guide drums. is wound diagonally over a range of 180 degrees or more.

6 is a rotational phase detector for detecting the rotational phase of the heads 2A and 2B, and the signal from this detector 6 is used as a head switching signal (hereinafter referred to as H8W signal) and is also attached to the head motor control circuit 7. Given it, the control circuit 7 controls the head motor 5f to rotate the heads 2A and 2B in a predetermined phase and at a predetermined rotational speed based on the output of the detector 6:
, is controlled through the head motor tank circuit 8. Reference numeral 9 denotes a fixed head for control signal reproduction (hereinafter referred to as CTL head) that reproduces control signals (hereinafter referred to as CTL signals) recorded at intervals of one frame in the longitudinal direction at the bottom of the tape, and 10 denotes a pinch head (not shown). A capstan constitutes a transport means for transporting the tape 1 in the longitudinal direction in cooperation with a roller, 11 is a capstan motor for rotating the capstan 1o, and 12 corresponds to the rotation of the capstan by 1°. A frequency signal generator that generates a frequency signal (hereinafter referred to as a capstan FG signal), 13 is a CTL head 9
Based on the CTL signal from the frequency signal generator 12 and the capstan FG number from the frequency signal generator 12, the capstan 10 is rotated in a predetermined phase and at a predetermined rotation speed.
This is a cab's tongue motor control circuit that controls the engine 11 to the cab's tongue motor Bi across the dynamic circuit 14.

15 performs playback at an arbitrary speed (stopping and reversing) based on the H8W signal from the rotational phase detector 6, the CTL signal from the CTL head 9, and the capstan FG signal from the frequency signal generator 12. Electro-mechanical transducer element 3A for causing heads 2A and 2B to each trace one recording track on tape 1 in each scanning field.
and 3B, and 16 is a conversion element drive circuit that drives the conversion elements 3A and 3B based on the pattern signal from the turn signal generation circuit 15.

FIG. 2 shows an example of the configuration of the pattern signal generation circuit 15. In the figure, the capstan FG signal from the frequency signal generator 12, the CTL code from the CTL head 9, and the H8W signal from the rotational phase detector 6 are input to input terminals 17, 18, and 19, respectively. Ru. 20 is a binary counter configured to count the capstan FG signal inputted to the terminal 17 and reset by the CTL signal inputted to the terminal 18;
a timing signal generation circuit that generates a timing signal synchronized with the H8W signal based on the H8W signal input to the H8W signal;
22 is a preset counter binary counter which presets the output of the counter 20 as preset data PD by the timing signal from the timing signal generation circuit 21 and counts the capstan FG signal input to the terminal 17; a D/A converter that D/A converts the output of the presettable counter 22 and outputs the first bang signal; 25 is an adder; 26 is a conversion element control pattern which is the output of the adder 25; An output terminal for outputting a signal (drive signal); 27 is an oscillator that generates a clock pulse of a predetermined frequency; 28 is an oscillator 2;
A counter 7 counts the clock pulses generated and is reset by a timing signal from the timing signal generation circuit 2. 29 is an I/A converter that converts the output of the counter 28 from D/A. That is, the output of the counter 22 is related to the transport speed of the recording medium, the output of the counter 28 is independent of the transport speed of the recording medium, and D
/A converter 29 outputs a fixed bang signal (
Next, regarding the operation of the VTR configured as described above at the time of a special repeat offense,
In particular, the operation of the pattern signal generation circuit shown in FIG. 2 will be explained with reference to FIGS. 3 and 4. FIG. 3 is a timing chart showing ideal waveforms of each part in FIGS. 2(a) to 2(g). Note that (d) to (g) in Figure 3 are particularly 1.5
The CTL signal during double-speed playback, the output of the second taunter 20 shown in the figure, the output of the same presettable counter 22 (or D/A converter 23), and the output of the adder 25 are shown, however, as shown in FIG. The timing chart shows an ideal output assuming that the frequency of the capstan FG signal is extremely high. 4B and 4B show the relationship between the center locus of the scanning of the heads 2A and 2B with respect to the center locus of the recording track on the tape 1 during still playback and 1.5x speed playback, respectively.

First, as the heads 2A and 2B are rotated by the head motor 5, the rotational phase detector 6 outputs the H8W signal as shown in FIG. The timing signal generation circuit 21 in the signal generation circuit 15 outputs a timing signal synchronized with each rise and fall of this HSW signal, as shown in FIG. 3(b). Originally, from the D/A converter 29, the heads 2A and 2B are continuously divided from O to 11 track pitches (hereinafter referred to as TP) within one field scanning as shown in FIG. 3(C). A stay pattern signal for transitioning to is output.

Here, so-called field-stall reproduction is performed in which the field signals of one recording track recorded by the recording head having the same azimuth angle as the reproduction heads 2A and 2B are alternately reproduced by both the heads 2A, 8L and 2B.
? The relationship between the scanning center trajectories of the heads 2A and 2B with respect to the recording track on the tape 1 at this time is as shown in FIG. 4(5). )! In Figure 4, the solid line indicates the center locus of the recording track of the field signal recorded by the recording head having the same azimuth angle as heads 2A and 2B, and the broken line indicates the center locus of the recording track of the field signal recorded by the recording head having the same azimuth angle as heads 2A and 2B.
The center locus of the recording track of the field signal recorded by the recording head with an azimuth angle different from
The white arrows indicate the center locus of scanning of the heads 2A and 2B, and CTL indicates the recording locus of the CTL signal (this is shown in Figure 4 CB) & the same applies here). ,
As shown in the figure, the scanning center trajectory (hereinafter referred to as head trajectory) C of the heads 2A and 2B is relative to the center trajectory (hereinafter referred to as track trajectory) a of the track to be reproduced.
The beginning of
To correct this and align the head trajectory C with the track trajectory a, set the heads 2A and 2B in the direction in which the tape 10 runs during recording, and in the opposite direction, so that within one field of scanning, from 0 to - It can be seen that it is sufficient to continuously shift up to the ITP.

Therefore, in the D/A conversion 529 shown in FIG. 2, if the output of the counter 28 is converted into a stay pattern signal as shown in FIG. 3(e), two heads and 2B are required for field stay reproduction. It can be seen that it is possible to satisfy the following transitions.

On the other hand, the capstan FG signal output from the frequency signal generator 12 as the capstan 10 is rotated by the carburetor stan motor 11 is applied to counters 20 and 22 in the pattern signal generation circuit 15 shown in FIG. ,
These counters 20 and 22 are connected to this capstan F'
The G signal will be counted, but here,
The counter 20 is reset every frame by the CTL signal from the CTL head 9, so its count output is set to the count value of -2 track pitches as the upper limit, and the CTL signal is Figure 3(d)
The result will be as shown in Figure 3(e). And 2
5, the presettable counter 22 receives the timing signal from the timing signal generation circuit 21 (see FIG. 3(b)).
In order to count the capstan FG signal while presetting the output of the counter 20 at that time,
The count output (or the output of the D/A converter 23) becomes as shown in FIG. 3(f) during 1.5 times speed playback.

Therefore, the adder 25 outputs the output of the D/A converter 23 and the sub-turn signal at this time.

Here, during playback at 1.5x speed, the head trajectories of the two heads and 2B with respect to the track locus on tape 1 are shown in Figure 4 (
The result will be as shown in B). That is, in the figure, A1. A2. A9
．． . . . indicates the head trajectory of head 2A, B1. B
2+B3+... is the head trajectory of head 2B,
Also, al + B2 + as +... indicates the track locus of the field track recorded by the recording head having the same azimuth angle as heads 2A and 2B; in the first field, the head trajectory A, In order to align the head trajectory B1 with the track trajectory a1, it is necessary to continuously apply a shift from 0 to 100.5 T P to the two heads within the scanning of the first field, and in the second field, the head trajectory Bl is the same. +1.5 within the second field scan for head 2B in order to match the track trajectory a.
It is necessary to continuously apply a change of +2TP minutes from T P to head 2A within the scan of the third field in order to match the head trajectory A2 with the next track trajectory a2 in the third field. +1.5 from vP minute
It is necessary to continuously apply a change up to TP minutes, and the fourth
In the field, in order to match the head trajectory B2 with the next track trajectory a, it is necessary to continuously apply a change from +0.5 TP minutes to +ITP minutes to the sum head 2B within the scanning of the 4th field. Hereinafter, the above process will be repeated every 4 fields, and the pattern signal shown in FIG. The above explanation is based on the 1711 when playing at 1.5x speed, but it is also possible to control the heads 2A and 2B commensurately at any playback speed, not just 1.5x speed. A pattern signal is obtained from the pattern signal generation circuit 15.

The pattern signal obtained from the pattern signal generation circuit 15 in this manner is applied to the conversion element drive circuit 16, which drives the two heads and two heads based on the turn signal.
The electro-mechanical transducers 3A and 3B are driven to bring the signal B on track to the track to be reproduced.

Based on the above principle, conventional devices
A noise-free reproduced video signal was obtained at any reproduction speed by obtaining a pattern signal for driving a shifting means such as a mechanical conversion element.

By the way, even when driving the shifting means of the rotary head using the above-mentioned driving pattern signals, there is naturally a gap between the recording track and the rotary head during normal playback (playback at the same tape speed as during recording). ), a so-called tracking error occurs.In the conventional VTR as mentioned above, the reproduction CTL signal is used to correct this tracking error (hereinafter simply referred to as tracking). This requires a period of time during which the magnetic tape is run for at least one frame, and cannot be corrected instantly.

Particularly when performing slow-motion playback, the tape is driven at a low speed, so the interval at which the playback CTL signal is obtained becomes long, and tracking requires a very long time.

On the other hand, with the miniaturization of VTRs in recent years, tracking control signals (hereinafter referred to as ATF signals) are obtained by recording pilot signals with different frequencies on each recording track, for example, and reproducing them, without recording CTL signals. VTRs that perform tracking have been proposed. However, when performing variable speed playback using the above-mentioned shifting means with this type of VTR, since there is no CTL signal, tracking cannot be controlled until the playback head actually traces the track.
Therefore, in the initial stage, the center line of the recording track and the center of the trace locus of the reproducing rotary head are parallel to each other, but deviate from each other in the medium running direction.

Generally, after starting tracing, the capstan is controlled using the ATF number δ, but it takes some time to follow up. Therefore, the above 9A
It is conceivable to add the TF signal to the driving pattern signal during variable speed reproduction, but this ATF signal is obtained only when the reproduction rotary head starts tracing the tape. Therefore, as mentioned above, if the trace locus of the reproducing head always deviates from the recording track in a fixed direction, tracking must be performed for each trace of each track, and the shifting means is moved to A immediately after the start of tracing.
Since it is driven by the TF signal, the shifting means cannot operate stably. Moreover, tracking is always not achieved at the beginning of tracing, which causes deterioration of the reproduced image.

<Objective of the Invention> The present invention has been made in view of the above-mentioned drawbacks, and it is an object of the present invention to perform stable and fast tracking using a displacement means for displacing a rotating head in a direction perpendicular to its rotating surface. The purpose of the present invention is to provide a rotary head type playback device that can perform the following functions.

<Explanation of Examples> The present invention will be explained in detail below using examples.

FIG. 5 is a diagram showing the main structure of a VTR according to a second embodiment of the present invention. In this figure, the same components as in FIG. 2 are designated by the same numbers.

This figure shows an example of the configuration of a pattern signal generating circuit that replaces the pattern signal generating circuit 15 of FIG. 1, and the pattern signal generating circuit is designated by 15' in the figure. In Fig. 5, 31 is the ATF' signal generation circuit, and 32 is the frequency -
m pressure converter (FVV converter), 3: (Fi adder, 34 is a voltage control generator (VCO), 36 is a terminal to which a power-up clear pulse (PUC) to be described later is input, 37 is a The RS flip-flop is reset and set by the rise or fall of the timing signal from the timing signal generation circuit 21, and 38 is a lower binary counter that counts the pulse signal output by the VCO 34. , when the capstan FG signal for one frame, that is, ZTP, is received at the terminal 17, if the output of the ATF signal is zero, the counter 38
is configured to output an overflow signal by counting the output of the VCO 34 and self-reset or return to zero. In addition, the above Noritsubu flop 37
The Q output of the lower counter 38 is 1 when its reset input is 1.
It is maintained in the reset state as long as the level is 1.
．． The configuration is such that the count is enabled when the signal becomes low level. 39 is an upper binary counter for counting the overflow signal from the lower counter 38; 40 is a counter that inputs the count output of the lower counter 38 as lower binary data; and inputs the count output of the upper counter 39 as upper binary data. This is a 1)/A converter similar to the 1)/A converter 23 in FIG. 5 that converts the composite count value from D/A.

Next, the operation of the pattern signal generation circuit configured as described above in a constant state, that is, when the output of the ATF signal generation circuit 31 is zero, will be explained with reference to FIGS. 6 and 7 (B). , sixth), (d-1) to (g-1)
is the value of the lower counter 38 when playing at 1.5x speed, (d-2) to (g-2) when playing at 3x speed, and (d-3) to (g-3) when playing at 0.6x speed. It shows the count output, the count output of the upper counter 39, the combined count output of the counters 38 and 39 (the father is the output of the D/A K counter 40), and the output of the adder 25'. (I3) shows the relationship between the center locus of the scanning of the heads 2A and 2B with respect to the center locus of the recording track on the tape 1 during 3x speed playback and 0.6x speed playback.

First, when the device is powered on or set to playback mode, the flip-flop 7 is reset and its Q output becomes high, thereby maintaining the lower counter 38 in the reset state. It will be like that. Then,
The head motor 5 starts rotating the heads 2A and 2B, and along with this, the rotational phase detector 6 starts rotating the heads 2A and 2B.
When the H8W signal as shown in FIG. 6(a) is output, the timing signal generating circuit 21 outputs the signal as shown in FIG. 6(b), similar to the pattern signal generating circuit 15 of FIGS. 2 and 5. A timing signal synchronized with each rise and fall of this H8W signal can be output.

When the timing (rr) signal is output from the timing signal generation circuit 21, the flip-flop 37 is set by the first 1g signal and its Q output becomes low, so the set state is resolved by the first counter 38. From then on, the pulse signal output from the VCO 34 will be colored. Also, the upper counter 39 will be reset at the timing (the timing of No. A).

Here, as mentioned above, when the capstan FG is input to the 2TP divider 17, the lower counter 38 outputs an overflow signal and self-resets or returns to zero, so its count output is 1.5 times faster (1). When playing at low speed, it is as shown in Figure 6 (d-1), and when playing at 3x speed, it is shown in Figure 6 (d-2).
6(d-3) during 0.6x speed playback. At this time, the count output of the upper counter 39 that counts the overflow signal from the lower counter 38 is as shown in FIG. 6 (e-1) during 1.5 times speed playback, and as shown in FIG. Like e-2), also,
When playing at 0.6 times speed, the result becomes as shown in FIG. 6 (e-3). Therefore, the combined count output of these counters 38 and 39 (or the output of the D/A converter 40) is as shown in FIG. 6 (f-1) during 1.5 times speed playback, and as shown in FIG. f-2), and when playing at 0.6x speed, as shown in Figure 6 (
f-3).

On the other hand, the pulses generated by the oscillator 27 are counted by a counter 28, and the counter 28 is reset by a timing signal. As a result, the output of the D/A converter 29 is as shown in FIG. 6(c).
2B' (a stay pattern signal that is continuously changed from r-0 to -ITP) is obtained.

From this K, from the adder 25, the D/A converter 4 at this time
As a result of adding the output of 0 and the output of the D/A converter 29,
When playing at 1.5x speed, a pattern signal as shown in Figure 6 (g-1) is generated, when playing at 3x speed, a turn signal as shown in Figure 6 (g-2) is generated, and at 0.6x speed. 6th when playing
A pattern signal as shown in Figure (g-3) is output.

Here, the pattern signal at the time of 1.5x speed playback in Figure 6 (g-1) is equivalent to the pattern signal in Figure 3 (B)), so the turn signal is It is clear that the required transition of two heads and 2B during 1.5x speed playback can be satisfied.

On the other hand, regarding the 3x speed playback and the 0.6x speed playback, the seventh
Considering Figures (4) and (I3), first, during triple speed playback, the head trajectories of heads 2A and 2B with respect to the track locus on tape 1 are as shown in Figure 7 (5). , that is, in the figure, as in FIG. 4 Q3), At, A2, As, . . . are head 2
The head trajectory of A, B,,B,,BS,... is the head trajectory of head 2B, and aI, A2 + a
3 + indicates the track locus of the field track recorded by the recording head having the same azimuth angle as heads 2A and 2B (this is also shown in Fig. 7). In the first field, in order to match the head trajectory A with the track trajectory a, the head 2A is scanned from 0 to +2T within the scanning of the first field.
It is necessary to continuously provide a shift of up to P minutes, and in the second field, the head trajectory B is changed to the next track trajectory A.

In order to match this, it is necessary to continuously give the head 2B a change from +ITP to +3TP within the second field scan, and this will be repeated every two fields below. Heads 2A and 2
It can be seen that the pattern signal shown in Fig. 6 (g-2) can satisfy the required transition of B. Father, 0
．． During 6x speed playback, the head trajectories of the heads 2A and 2B relative to the track trajectories on the tape 1 become as shown in FIG. 7(B). That is, in the first field, the head trajectory A,
In order to match the head trajectory B1 with the track trajectory al, it is necessary to continuously give the head 2A a shift from 0 to -0.4T P within the scanning of the first field, and in the second field, the head trajectory B1 is also aligned with the track trajectory al. +0 within the second field scan for head 2B to match a1.
．． It is necessary to continuously provide a transition from 6 T IJ minutes to +0.2 T P minutes, and in the third field, the head trajectory A2 is the same as the track trajectory a.

It is necessary to continuously give the head 2A a shift from +1.2 T P minutes to +0.8 T P minutes within the scanning of the third field, and in the fourth field, the head trajectory B is also changed to the track position. +1 within the scanning of the fourth field for head 2B in order to match the trajectory a.
．． It is necessary to continuously apply a change from 8 T P minutes to +1.4'rP minutes, and in the fifth field, in order to match the head trajectory A3 to the next track trajectory a, the fifth field is applied to two heads. +0.4 T within the scan of
It is necessary to continuously apply a shift from P to O, and in order to match the head trajectory B3 with the track trajectory a in the sixth field, the shift from +ITP to +0.6TP must be applied to the head 2B within the scan of the sixth field. It is necessary to provide a continuous shift, and in order to match the head trajectory A4 with the track trajectory a in the 7th field, +1.6 T P is applied to the head 2A within the scanning of the 7th field.
It is necessary to continuously apply a shift from 1 minute to +1.2 TP minutes, and in the 8th field, in order to match the head trajectory B4 to the next track trajectory a3, +0.2 TP is given to the head 2B within the scan of the 8th field. -0 from T P minute,
It is necessary to continuously give a change of 2TP minutes, and in the 9th field, the head trajectory Ask is also changed from +0.8 T P minutes to +0.4 within the scanning of the 9th field for the head 2A in order to match the track trajectory A3. It is necessary to continuously apply a shift of up to T P, and in order to match the head trajectory B with the track trajectory a3 in the 10th field, the shift from +1.4 TP to +ITP within the scan of the 10th field is applied to the head 2B. It is necessary to continuously apply the displacement up to 10 minutes, and the above steps will be repeated every 10 fields. It can be seen that the pattern signal shown in can satisfy this requirement.

Incidentally, although reverse playback was not mentioned in the explanation of the above embodiment, during reverse playback, measures such as inverting the output of the D/A converter 40 and then adding it to the output of the stay pattern generator 24' can be taken. It's fine if it's off.

Next, the operation at the initial stage of reproduction, that is, the operation when the ATF signal generation circuit 31 has an output will be described. Figures 8(i) to (v) are images of Figures 5(i) to (v) at the initial stage of regeneration.
v) This is a timing chart showing the waveforms of each part.
A case will be explained in which the distance is shifted by ΔX from the center line of the recording track. First, the ATF signal v6x is output from the ATF signal generation circuit 31. Then, as shown in FIG. 8, since the output (iii) of the adder 33 rises by .lambda. corresponding to the correction value, the frequency of the output (1v) of the VCO 34 increases as shown in FIG. When the output of this VCO 34 is counted by the upper counter 39 and the lower counter 38, the output is as shown in FIG. 8(v). ), a indicates the output when ideal tracking is performed, and a' indicates the C output when tracing is always deviated from the center locus of the recording track by ΔX. As is clear from the figure, what is deviated by ΔX at the beginning of one trace gradually becomes an output a The correction of the obtained ΔX is performed only in the first trace, and thereafter this correction amount is always held in the late counter 38. In subsequent traces, the above-mentioned shifting means is driven by the corrected driving pattern signal, so no image disturbance occurs.

According to the configuration of the above-described embodiment, the track deviation at the beginning of reproduction can be quickly corrected by uncontrollably driving the displacement means of the rotary head, and the correction amount is thereafter held in the counter 38 to be traced. Since there is no need to control and drive the displacement means every time, the displacement means becomes unstable. by i+! Ii It also does not cause PJ deterioration.

Although the explanation of the above-mentioned embodiment describes variable-speed playback, the structure of the above-mentioned embodiment can also be used when normal playback is performed with a rotating bet that is shifted by a shifting means, so that the initial stage of playback, etc. track misalignment at all times, stably and quickly. Can be corrected.

. As described above with reference to the embodiments, according to the present invention, track misalignment at the initial stage of playback or track misalignment caused by some external force can be shifted in the direction in which the rotating head is directly heated with its rotating surface. To obtain a rotary head type reproducing device capable of stably and quickly making corrections using a shifting means,

[Brief explanation of drawings]

@Figure 1 is a diagram showing a schematic configuration of the main parts of a conventional VTR, Figure 2 is a diagram showing an example of the pattern signal generation circuit of the VTR shown in Figure 1, and Figure 3 is a diagram showing waveforms of each part of Figure 2. Figure, Figure 4 (5), CB) u respectively during stay regeneration and 1.5
A diagram showing the relationship between the recording track on the tape and the scanning of the head during double-speed playback. FIG. 5 is a block diagram showing the main part configuration of a VTR according to an embodiment of the present invention. FIG. The figure which shows the waveform of the number part of 5th figure in. Figures 7 (5) and (13) Diagrams showing the relationship between recording tracks on the tape and head scanning during Fi 3x speed playback and 0.6x speed playback. Figure 8 is the number 5 in the initial state. FIG. 1 is a magnetic tape as a recording medium, 2A and 2B are rotary heads, 3A and 3B are bimorphs as displacement means, 1o is a capstan, 11 is a capstan motor,
12 is a capstan FG signal generator, 2o is a counter,
22 is a presettable counter, 23 is a D/A converter,
25 is an adder, 27 is an oscillator, 28 is a counter, 29 is a D/A converter, and 31 is A as a means for obtaining a second signal.
TF signal/signal generation circuit, 32 is an FV that outputs the first signal
Converter, 33 is an adder, 34 is a means for eliminating pulse problems, CO538, 39 is a divider means, and 40 is an I/A converter.

Claims (1)

[Claims] 1) A recording signal is recorded by tracing recording tracks formed at a predetermined arrangement pitch on a recording medium transported by a transporting means with a rotary head that is displaced by a displacement means in a direction perpendicular to the rotation surface of the recording track. An apparatus for performing reproduction, comprising means for obtaining a first signal having a voltage related to the recording medium transporting operation of the transporting means, and a second signal having a voltage corresponding to a deviation between the rotary head and the recording track. means for obtaining a signal; means for obtaining a pulse signal having a frequency corresponding to the first signal and the second signal;
A rotary head type reproducing device comprising a counting means for counting the pulse signals, and a means for forming a drive signal for driving the shifting means in accordance with an output of the counting means.